You get Medicare automatically after you've been on SSDI for 24 months

If you receive Social Security Disability Insurance (SSDI), you don't have to do anything separate to get Medicare. Social Security enrolls you automatically once you've been collecting SSDI for 24 consecutive months. That means your Medicare coverage starts in the 25th month of your SSDI payments, whether you're 30 years old or 65.

The 24-month waiting period is built into the law. It doesn't matter when you were born or what your disability is—the clock starts the month your SSDI payments begin. Social Security tracks this for you and sends you information about your Medicare coverage before it starts.

You'll receive Medicare Part A (hospital insurance) and Part B (medical insurance) together. You don't choose between them or opt out of Part B the way people turning 65 can. Both parts are included in your SSDI pathway to Medicare.

Key Takeaways

  • Medicare begins automatically 24 months after your first SSDI payment, with no action required on your part.
  • You receive both Part A (hospital) and Part B (doctor visits) together, and Part B is included without the premium delay that applies to people over 65.
  • Social Security sends you a Medicare card and information packet about three months before your coverage starts.
  • If you're already on Medicare when you turn 65, your coverage continues without interruption or change.

What happens during the 24-month waiting period

While you're waiting for Medicare to start, you may be able to get coverage through other routes. Some states offer Medicaid to people on SSDI when ready, without waiting. Medicaid is separate from Medicare—it's a state program that covers doctor visits, hospital stays, and prescriptions, often with little or no cost to you.

Whether your state covers SSDI recipients through Medicaid depends on where you live. A few states have very limited Medicaid programs and may not cover working-age adults on disability. Most states do. You can contact your state Medicaid office or call 211 to find out what's available in your area while you wait for Medicare.

If you don't have Medicaid and can't afford health coverage during those 24 months, you may be able to buy a plan through the Health Insurance Marketplace. You might also may have access to for a subsidy to lower the cost, depending on your income.

How Social Security notifies you about Medicare

Social Security doesn't make you explore for Medicare or fill out forms. About three months before your Medicare starts, you'll receive a notice in the mail explaining your coverage and what to expect. This notice will include important information about your Part A and Part B coverage.

Roughly one month before your Medicare begins, Social Security will mail you a Medicare card. This card shows your Medicare number and the date your coverage starts. Keep this card with you when you see doctors or go to the hospital.

If you don't receive your Medicare card by the time your coverage should start, contact Social Security at 1-800-772-1213. You can also create an account on ssa.gov to check the status of your Medicare enrollment.

What Medicare Part A and Part B cover

Part A covers hospital stays, skilled nursing facility care after a hospital stay, hospice care, and some home health services. You don't pay a monthly premium for Part A—it's included with SSDI. You may have a deductible when you're admitted to the hospital, and you'll pay coinsurance for longer stays.

Part B covers doctor visits, outpatient care, lab tests, imaging, and some preventive services. Part B has a monthly premium, which Social Security deducts from your SSDI payment. The premium amount changes each year. Part B also has an annual deductible and coinsurance for some services.

Neither Part A nor Part B covers prescription drugs. You'll need to enroll in Part D (prescription drug coverage) separately if you want it. You can sign up for Part D when your Medicare starts, and you have a limited window to do so without a penalty for late enrollment.

What happens if you return to work

If you start working and your earnings are high enough that Social Security stops your SSDI payments, your Medicare doesn't stop automatically. You can keep Medicare Part A and Part B for at least 8.5 years after your SSDI ends, even if you're working and earning good money. You'll still pay the Part B premium, which will be deducted from any ongoing Social Security benefits you receive, or you'll get a bill if you have no other Social Security income.

This extended Medicare coverage is called Medicare continuation, and it's one of the work incentives built into the SSDI program. It gives you time to see whether work is sustainable for you without losing health coverage.

After the 8.5-year period ends, you can keep Medicare if you're 65 or older. If you're younger than 65 and your work earnings are above a certain level, you may lose Medicare, but you can usually buy it back by paying the full premium yourself.

Coordinating Medicare with other insurance

If you have insurance through a job—either your own job or a family member's—Medicare becomes your secondary insurance. That means the job-based plan pays first, and Medicare pays what's left. You still need to keep both active.

If you have Medicaid when Medicare starts, both programs work together. Medicaid often covers costs that Medicare doesn't, like copayments and deductibles. In some states, Medicaid also covers services Medicare doesn't, like dental or vision care. Having both is called "dual coverage," and it's common for people on SSDI.

Tell your doctors and hospitals that you have Medicare as soon as your coverage starts. Give them your Medicare card and let them know about any other insurance you carry. This prevents billing confusion and makes sure claims are processed correctly.

Frequently Asked Questions

What if I've been on SSDI for less than 24 months—do I have any health coverage options?

You may may have access to for Medicaid in your state, which often covers SSDI recipients when ready. You can also buy coverage through the Health Insurance Marketplace, where you might may have access to for a subsidy based on your income. Call 211 or contact your state Medicaid office to find out what's available where you live.

Can I choose not to take Medicare Part B?

No. When you're on SSDI, Part B is automatic and included with Part A. You can't decline it. However, you can choose whether to enroll in Part D (prescription drugs) and whether to add supplemental coverage later.

Do I have to pay the Part B premium if I'm on SSDI?

Yes. The Part B premium is deducted from your SSDI payment each month. The amount changes yearly. If your SSDI payment is very small, Social Security may cover part of the premium for you, but you'll still see the deduction on your payment statement.

What if I turn 65 while I'm on SSDI and already have Medicare?

Your Medicare coverage continues without any change. You don't need to do anything. Your SSDI and Medicare both continue as they are, and you won't go through the enrollment process that people normally do at 65.

Can I get Part D prescription drug coverage when my Medicare starts?

Yes. You have a limited time to enroll in Part D without paying a penalty for late enrollment. Social Security will tell you about this window in the information they send before your Medicare starts. You can enroll through Medicare.gov or by calling 1-800-MEDICARE.